Resolution and contrast in terahertz pulse time-domain holographic reconstruction

Here, we present a comprehensive study of the reconstruction quality in terahertz (THz) pulse time-domain holography. We look into single wavelength reconstructions, as well as broadband recovery enabled by the ultrabroadband nature of radiation and coherent detection enabled by electro-optic or pho...

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Bibliographic Details
Published in:Applied optics (2004) 2019-12, Vol.58 (34), p.G231
Main Authors: Turov, Artëm T, Kulya, Maksim S, Petrov, Nikolay V, Gorodetsky, Andrei
Format: Article
Language:English
Subjects:
Amplitudes
Broadband
Holography
Phase objects
Reconstruction
Time domain analysis
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Summary:Here, we present a comprehensive study of the reconstruction quality in terahertz (THz) pulse time-domain holography. We look into single wavelength reconstructions, as well as broadband recovery enabled by the ultrabroadband nature of radiation and coherent detection enabled by electro-optic or photoconductive sensing. We demonstrate the transverse resolution dependence for amplitude and phase objects on the solid angle of the inline recorded time-domain THz hologram, and then turn to the contrast of reconstructed binary amplitude objects, and further to longitudinal resolution of phase objects. We show that transverse resolution can reach values comparable to the wavelength of the radiation used, and longitudinally, phase objects can be resolved with even greater precision. We compare the obtained resolution with theoretical estimates and show that THz pulse time-domain holography is a powerful non-contact imaging tool.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.58.00G231